Tools & Wizards About Us

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

aqicn.info

Beijing Air Pollution: Real-time Air Quality Index

Page Load Speed

5.7 sec in total

First Response

984 ms

Resources Loaded

4.2 sec

Page Rendered

596 ms

About Website

Welcome to aqicn.info homepage info - get ready to check Aqicn best content for China right away, or after learning these important things about aqicn.info

Real-time air pollution index for 100+ countries

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Key Findings

We analyzed Aqicn.info page load time and found that the first response time was 984 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

aqicn.info performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

60/100

25%

SI (Speed Index)

Value10.0 s

9/100

10%

TBT (Total Blocking Time)

Value3,910 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.419

23/100

15%

TTI (Time to Interactive)

Value16.6 s

5/100

10%

Network Requests Diagram

984 ms

style.min.css

318 ms

bundle.min.js

766 ms

adsbygoogle.js

382 ms

style.min.css

468 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Aqicn.info, 14% (12 requests) were made to Googleads.g.doubleclick.net and 14% (12 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Mapq.waqi.info.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.4 MB (61%)

Content Size

3.9 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Aqicn.info main page is 3.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. HTML takes 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 2.2 MB

  • Original 2.4 MB
  • After minification 2.4 MB
  • After compression 213.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 2.2 MB or 91% of the original size.

Image Optimization

-4%

Potential reduce by 23.5 kB

  • Original 657.6 kB
  • After minification 634.1 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Aqicn images are well optimized though.

JavaScript Optimization

-21%

Potential reduce by 177.7 kB

  • Original 831.1 kB
  • After minification 831.1 kB
  • After compression 653.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 177.7 kB or 21% of the original size.

CSS Optimization

-18%

Potential reduce by 1.8 kB

  • Original 9.9 kB
  • After minification 9.9 kB
  • After compression 8.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Aqicn.info needs all CSS files to be minified and compressed as it can save up to 1.8 kB or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (43%)

Requests Now

82

After Optimization

47

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 82 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Aqicn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

aqicn.info accessibility score

76

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

aqicn.info best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

aqicn.info SEO score

73

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Aqicn.info can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Aqicn.info main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph data is detected on the main page of Aqicn. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: